body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f9;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.content {
  background-color: #fff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  width: 400px;
}

h2 {
  text-align: center;
  color: #333;
}

form table {
  width: 100%;
}

form table td {
  padding: 5px;
  /* 减小内边距，让两个 td 离得更近 */
}

input[type="text"] {
  width: 100%;
  padding: 8px;
  border: 1px solid #ccc;
  border-radius: 4px;
  box-sizing: border-box;
}

input[type="button"] {
  padding: 10px 20px;
  background-color: #007BFF;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

input[type="button"]:hover {
  background-color: #0056b3;
}

input[type="button"]:last-child {
  background-color: #6c757d;
}

input[type="button"]:last-child:hover {
  background-color: #5a6268;
}